Cyphomyrmex laevigatus

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Cyphomyrmex laevigatus
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Cyphomyrmex
Species: C. laevigatus
Binomial name
Cyphomyrmex laevigatus
Weber, 1938

Cyphomyrmex laevigatus casent0173956 profile 1.jpg

Cyphomyrmex laevigatus casent0173956 dorsal 1.jpg

Specimen labels

Cyphomyrmex laevigatus seems to be a denizen of the soil in woodland. The Surinam catches came from primary forest and were secured from pitfall traps and desiccated soil samples (Kempf 1966).

Identification

See the description section below.

Distribution

Known from Bolivia, Suriname, Brazil and Paraguay and Peru.

Distribution based on Regional Taxon Lists

Neotropical Region: Bolivia (type locality), Ecuador, French Guiana, Guyana, Paraguay, Peru, Suriname.

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Female and male unknown.

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • laevigatus. Cyphomyrmex (Cyphomannia) laevigatus Weber, 1938b: 184, figs. 20, 21 (w.) BOLIVIA. See also: Kempf, 1966: 178; Snelling, R.R. & Longino, 1992: 493.

Description

Worker

Kempf 1966 Cyphomyrmex 1-13.jpg

Kempf (1966) - (lectotype) Total length 3.5 (3.3-3.7) mm; head length 0.91 (0.85-0.96) mm; head width 0.88 (0.85-0.96) mm; thorax length 1.20 (1.07-1.23) mm; hind femur length 0.91 (0.85-0.94) mm. Rather close to Cyphomyrmex bicornis with the following differential characters:

Head (fig 4) dorsally with vestigial longitudinal rugae. Clypeus with a small to vestigial accessory tooth mesad of antero-lateral one. Auriculate occipital lobes slightly less projecting caudad. Antennal scape rather abruptly thickened after basal third. Eyes with about 9 facets across greatest diameter.

Thorax (fig 26) completely unarmed on dorsum. Pronotal disc laterally rather sharply carinate. Mesoepinotal junction not deeply impressed, but with a distinct mesoepinotal suture. Fore femora dorso-apically with a short longitudinal, lamellate carinule. Hind femora (fig 41) as in bicornis, not longer than maximum head width.

Pedicel (fig 26,32). Petiole much shorter and broader, likewise without dorsal ridges. Postpetiole with a weak impression laterally, discad of posterior border; the latter vestigially notched in the middle.

Hairs minute, fine, strictly appressed, less conspicuous than in bicornis.

Type Material

Kempf (1966) - 12 workers from a single nest series; 4 workers (lectotype and paratypes) examined (NAW, MCZ).

References

  • Kempf, W. W. 1966 [1965]. A revision of the Neotropical fungus-growing ants of the genus Cyphomyrmex Mayr. Part II: Group of rimosus (Spinola) (Hym., Formicidae). Stud. Entomol. 8: 161-200 (page 178, see also)
  • Snelling, R. R.; Longino, J. T. 1992. Revisionary notes on the fungus-growing ants of the genus Cyphomyrmex, rimosus group (Hymenoptera: Formicidae: Attini). Pp. 479-494 in: Quintero, D., Aiello, A. (eds.) Insects of Panama and Mesoamerica: selected stu (page 493, see also)
  • Weber, N. A. 1938b. The biology of the fungus-growing ants. Part IV. Additional new forms. Part V. The Attini of Bolivia. Rev. Entomol. (Rio J.) 9: 154-206 (page 184, figs. 20, 21 worker described)